Arch construction for furnaces.



No. 880,910. PATENTED MAR. 3, 1908.

P. ORTH.

ARCH CONSTRUCTION FOR FURNACES.

APPLICATION FILED MAY 6,1907.

FRANK ORTH, OF INDIANA HARBOR, INDIANA.

ARCH CONSTRUCTION FOR FURNACES.

Specificationof Letters Patent.

Patented March 3, 1908.

Application filed May 6, 1907. Serial No. 371,983.

I To all whom it may concern:

The arch 2 consists of the bricks or blocks Be it known that I, FRANK OR'rH, a citizen 7 and the intermediate arched ribs 8, said of the United States of America, residing at IndianaHarbor, in the county of Lake and State of Indiana, have invented new and useful Improvements in Arch Constructions for Furnaces, of which the following is a specification.

This invention relates to arch constructions 10 for furnaces, designed more articularly for use in open hearth, steel, g ass, and-other. melting furnaces, and one of the principal objects of the invention is to provide an arch Construction of greater strength and durability than the ordinary arch construction, and which will be more readily repairable when partially burned out.

In the usual construction of arches, when 2 the inner side ofthe arch wall is burned away irregularly at different points, the unequal distribution of weight would thrust the arch out of its proper radius, and hence, there would be an outward movement at some "points and an inwardmovement. at other points, v which would eventually cause the Since an open hearth arch.

usuallyburns out irregularly, it is impossible to determine in advance what-point or points s arch to collapse.

will burn out first. In the construction of my im roved arch, I reinforce the arch with ribsw ich will support the arch when it is burned away to quite a thin shell. It is to overcome, to a great extent, this defect in furnace arches, and to facilitate the repairing of arches partially burned away, that my invention has for its principal object. and other objects may be attained by means of the construction illustrated in theaccom- Y 'panying drawings, in which: -40 Figure 1 is a plan view of a furnace made in accordance'with'myinvention. Fig. 2 is a side elevation and artial longitudinal section of the same; ig. .3 is a transverse section on the line' 3-3, Fig. -1, looking in the direction indicated by the arrows.

- Referring to the drawing for a more particular description of my invention, the numeral 1 designates the sidewalls ofthe furnace, and 2 is the arch. Extending along the side walls at the top on both sides is an angle e buck stays 4 comprise iron brace,3, and t two channel irons provided with a reinforcing plate 5 and brace rods 6 extending through said plates between the angle iron beams of the buck stays.

the bricks, as shown in Fig. 2.

' 1. A furnace comprising This face of the bricks.

ribs extending above the upper surface of The end portions of the arch are oppositely inclined,

as shown at 9, and longitudinal stay rods 10 extend from end to end of the furnace, and being connected to buck stays in a manner similar to those already described. The

arched ribs 8 may be formed in one single piece, as shown at the left in Fig. 1, but it will be obvious that these ribs may be formed in sections. abut against the skew-backs 11.

It will be obvious that any suitable number of ribs 8 may be used de ending upon the thickness of the crown .wal and the purposp1 to which the'furnace is designed to be use I With a furnace-made in accordance with my invention, the crown wall or arch being madein transverse sections with intermediate ribs, provides a very strong and durable arch, and when it is desired to thicken orcpatch the portions of the wall The ends of the arch after it has been partially burned out and becomes too thin for safety, new bricks may be inserted between the ribs 8, and in this way the thin portions of the arch may be s5 quickly repaired, and this is deemed an important feature in my construction.

Having thus described the invention, what I claim is:

side walls, angle iron braces at the tops 0 said walls, angle iron buck stays connected by cross rod.

braces, and an arch comprisin transverse sections of bricks, and interme iate arched ribs, said ribs extendlng beyond 2. An arch construction for furnaces comprising transverse brick sections and1nterthe outer mediate arched ribs formed of blocks of refractory material, the inner surfaces of the rib blocks lying flush with tlie'bricks and the outer surfaces of the rib blocks extending E beyond the outer surface of the bricks.

In testimony whereof, I aflixmy signature in presence of two witnesses.

. FRANK ORTH.

Witnesses:

ELLA G. ORTH, ILA M. WALKER. 

